我一直试图使用“DESede”加密对一些数据进行编码和解码。 编码进行得很好,但我在解码时遇到问题。 我得到的格式像“[B @ 7764dc81”(只是一个示例值),应该是字节[]格式的编码数据,但我以字符串的形式得到这个数据(这是一个要求) ,现在,我想“[B @ 7764dc81”(只是一个示例值)从字符串转换为字节[]形式,但不幸的是,它不适合我。将字符串转换为byte []和byte []转换为JAVA中的字符串
函数String.getBytes();一次又一次返回不同的结果,其中调用此方法的String对象是相同的。但是通过方法(Arrays.toString(String.getBytes()))获得的数组值返回相同的值,并且这让我很头疼。
基本上,我想根据机器的主板序列号和MAC地址对一些值进行编码,将这两个键连接起来,并生成一个新的密钥。之后,我想解码获得的密钥,将其拆分回来,并检查密钥是否与MAC地址和主板序列号的原始值完全匹配。我在后面的程序中遇到问题。我在“[B @ f56dec29”(只是一个示例值)格式中获得了两个分片字符串值,我希望它们是byte []格式,以便我可以将它们传递到我的ObjectCrypter.decryptF()函数中。此外,这个函数引发一个异常,说“密钥长度必须是8的倍数......”。 主要功能在日期可视化方面有很大帮助,正确的人可能会乍一看猜测实际发生的情况。 我有两个文件,和下面的代码给出: Security.java
public class Security {
public static void main(String[] args) throws NoSuchAlgorithmException,UnknownHostException, SocketException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, NoSuchPaddingException, UnsupportedEncodingException
{
String algorithm = "DESede";
ObjectCrypter obj = null;
Key symKey = KeyGenerator.getInstance(algorithm).generateKey();
Cipher c = Cipher.getInstance(algorithm);
String serial = getSerialNumber();
String mac = getMacAddress();
serial = getSerialNumber();
mac = getMacAddress();
byte[] encryptionBytes1 = obj.encryptF(serial,symKey,c);
System.out.println("Serial: " + serial);
System.out.println("Encr: " + encryptionBytes1);
System.out.println("Decr: " + obj.decryptF(encryptionBytes1, symKey, c));
byte[] encryptionBytes2 = obj.encryptF(mac,symKey,c);
System.out.println("MAC: " + mac);
System.out.println("Encr: " + encryptionBytes2);
System.out.println("Decr: " + obj.decryptF(encryptionBytes2, symKey, c));
System.out.println("EncryptionBytes: "+encryptionBytes1);
System.out.println("Array EncBytes: "+Arrays.toString(encryptionBytes1));
String ts = encryptionBytes1.toString();
System.out.println("TesString: "+ts);
System.out.println("TesString ConvBytes: "+ts.getBytes("ISO-8859-1"));
System.out.println("TesString ConvBytes2: "+ts.getBytes("ISO-8859-1"));
System.out.println("ts array: "+Arrays.toString(ts.getBytes("ISO-8859-1")));
byte[] tsec = ts.getBytes("ISO-8859-1");
System.out.println("tsec array: "+Arrays.toString(tsec));
System.out.println("esTrEncrypt: "+tsec);
System.out.println("esTrEncryptBytes1: "+tsec.toString().getBytes("ISO-8859-1"));
System.out.println("esTRarray1: "+Arrays.toString(tsec));
System.out.println("esTrEncryptBytes2: "+tsec.toString().getBytes("ISO-8859-1"));
System.out.println("esTRarray1: "+Arrays.toString(tsec));
System.out.println("esTrEncryptBytes3: "+tsec.toString().getBytes("ISO-8859-1"));
System.out.println("esTRarray1: "+Arrays.toString(tsec));
String decoded = new String(encryptionBytes1, "ISO-8859-1");
System.out.println("Decoded: "+decoded);
byte[] encoded = decoded.getBytes("ISO-8859-1");
System.out.println("Encoded: "+encoded);
System.out.println("ArrayEncoded: "+Arrays.toString(encoded));
String decrypted = obj.decryptF(encoded, symKey, c);
System.out.println("decrypted: "+decrypted);
serial = getSerialNumber();
mac = getMacAddress();
byte[] encryptionBytes12 = obj.encryptF(serial,symKey,c);
System.out.println("Serial: " + serial);
System.out.println("Encr: " + encryptionBytes12);
System.out.println("Decr: " + obj.decryptF(encryptionBytes1, symKey, c));
byte[] encryptionBytes22 = obj.encryptF(mac,symKey,c);
System.out.println("MAC: " + mac);
System.out.println("Encr: " + encryptionBytes22);
System.out.println("Decr: " + obj.decryptF(encryptionBytes2, symKey, c));
}//end test
public static String generateData() throws NoSuchAlgorithmException, NoSuchPaddingException, UnknownHostException, SocketException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException
{
String part1 = null, part2 = null;
String algorithm = "DESede";
ObjectCrypter obj = null;
Key symKey = KeyGenerator.getInstance(algorithm).generateKey();
Cipher c = Cipher.getInstance(algorithm);
String serial = getSerialNumber();
String mac = getMacAddress();
byte[] encryptionBytes = obj.encryptF(serial, symKey, c);
part1 = encryptionBytes.toString();
byte[] encryptionBytes2 = obj.encryptF(mac, symKey, c);
part2 = encryptionBytes2.toString();
part1 = sliceString(part1);
part2 = sliceString(part2);
return part1+part2;
}//end generateData
public static boolean checkLicense(String license) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, UnknownHostException, SocketException, UnsupportedEncodingException
{
String part1 = null, part2 = null;
String genSerial = null, genMac = null;
if (license.length() == 16)
{
part1 = "[[email protected]" + license.substring(0, 8);
part2 = "[[email protected]" + license.substring(8, license.length());
}//end if
else if (license.length() == 15)
{
part1 = "[[email protected]" + license.substring(0, 7);
part2 = "[[email protected]" + license.substring(7, license.length());
}//end if
else
{
return false;
}//end else
byte[] bpart1 = part1.getBytes("ISO-8859-1");
byte[] bpart2 = part2.getBytes("ISO-8859-1");
System.out.println("bytes: "+bpart1 + "\t" + bpart2);
System.out.println("parts: "+part1 + "\t" + part2);
String algorithm = "DESede";
ObjectCrypter obj = null;
Key symKey = KeyGenerator.getInstance(algorithm).generateKey();
Cipher c = Cipher.getInstance(algorithm);
genSerial = sliceString(obj.decryptF(bpart1, symKey, c));
genMac = sliceString(obj.decryptF(bpart2, symKey, c));
System.out.println(genSerial + "\t" + genMac);
System.out.println(getSerialNumber() + "\t" + getMacAddress());
if (genSerial == getSerialNumber() && genMac == getMacAddress())
{
return true;
}//end if
else
{
return false;
}//end else
}//end checkLicense
public static String sliceString(String arg)
{
return arg.substring(3);
}//end sliceString
public static String getSerialNumber()
{
String output = "";
try
{
Process p=Runtime.getRuntime().exec("wmic baseboard get serialnumber");
//p.waitFor();
BufferedReader reader=new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
int index = 0;
while((line = reader.readLine()) != null)
{
if (line.length() > 0)
{
output = line;
}//end if
}//end while
}
catch(IOException e1) {}
return output;
}//end extractMBSerialNumber
public static String getMacAddress() throws UnknownHostException, SocketException
{
InetAddress ip;
ip = InetAddress.getLocalHost();
NetworkInterface network = NetworkInterface.getByInetAddress(ip);
byte[] mac = network.getHardwareAddress();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < mac.length; i++) {
sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : ""));
}
return sb.toString();
}
}
为ObjectCrypter.java的代码是:
public class ObjectCrypter {
static String algorithm = "DESede";
static byte[] encryptF(String input,Key pkey,Cipher c) throws InvalidKeyException, BadPaddingException,
IllegalBlockSizeException {
c.init(Cipher.ENCRYPT_MODE, pkey);
byte[] inputBytes = input.getBytes();
return c.doFinal(inputBytes);
}
static String decryptF(byte[] encryptionBytes,Key pkey,Cipher c) throws InvalidKeyException,
BadPaddingException, IllegalBlockSizeException {
c.init(Cipher.DECRYPT_MODE, pkey);
byte[] decrypt = c.doFinal(encryptionBytes);
String decrypted = new String(decrypt);
return decrypted;
}
}
您的文章很长。尝试更具体。 – Maroun
如果这是为了实现复制保护,您将面临艰苦的战斗。 –